--- /dev/null
+<?xml version="1.0"?>
+<!--
+/******************************************************************************
+ * $Id: nitf_spec.xsd 22867 2011-08-06 13:47:27Z rouault $
+ *
+ * Project: NITF Library
+ * Purpose: Schema of description of NITF TREs
+ * Author: Even Rouault, <even dot rouault at mines dash paris dot org>
+ *
+ **********************************************************************
+ * Copyright (c) 2011, Even Rouault
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ ****************************************************************************/
+-->
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
+ <xs:element name="tres">
+ <xs:complexType>
+ <xs:sequence>
+ <xs:element name="tre" type="treType" minOccurs="0" maxOccurs="unbounded"/>
+ </xs:sequence>
+ </xs:complexType>
+ </xs:element>
+
+ <xs:complexType name="treType">
+ <xs:group ref="itemType"/>
+ <xs:attribute name="name" type="xs:string"/>
+ <xs:attribute name="md_prefix" type="xs:string" use="optional"/>
+ <xs:attribute name="length" type="positiveInteger" use="optional"/>
+ <xs:attribute name="minlength" type="xs:integer" use="optional"/>
+ <xs:attribute name="maxlength" type="xs:integer" use="optional"/>
+ <xs:attribute name="location" type="xs:string" use="optional"/>
+ </xs:complexType>
+
+ <xs:group name="itemType">
+ <xs:sequence>
+ <xs:choice minOccurs="0" maxOccurs="unbounded">
+ <xs:element name="field" type="fieldType">
+ <xs:key name="att1">
+ <xs:selector xpath="."/>
+ <xs:field xpath="@length|@length_var"/>
+ </xs:key>
+ </xs:element>
+ <xs:element name="loop" type="loopType">
+ <xs:key name="att2">
+ <xs:selector xpath="."/>
+ <xs:field xpath="@counter|@iterations|@formula"/>
+ </xs:key>
+ </xs:element>
+ <xs:element name="if" type="ifType"/>
+ </xs:choice>
+ <xs:element name="if_remaining_bytes" type="if_remaining_bytesType" minOccurs="0" maxOccurs="1"/>
+ </xs:sequence>
+ </xs:group>
+
+ <xs:complexType name="loopType">
+ <xs:group ref="itemType"/>
+ <xs:attribute name="name"/>
+ <!-- xs:choice -->
+ <xs:attribute name="counter" type="xs:string"/>
+ <xs:attribute name="iterations" type="positiveInteger"/>
+ <xs:attribute name="formula">
+ <xs:simpleType>
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="(NPART+1)*(NPART)/2"/>
+ <xs:enumeration value="(NUMOPG+1)*(NUMOPG)/2"/>
+ <xs:enumeration value="NPAR*NPARO"/>
+ <xs:enumeration value="NPLN-1"/>
+ <xs:enumeration value="NXPTS*NYPTS"/>
+ </xs:restriction>
+ </xs:simpleType>
+ </xs:attribute>
+ <!-- /xs:choice -->
+ <xs:attribute name="md_prefix" use="optional">
+ <xs:simpleType>
+ <xs:restriction base="xs:string">
+ <xs:pattern value="([a-z]|[A-Z]|[0-9]|_)*(%[0-9]*d)?([a-z]|[A-Z]|[0-9]|_)*"/>
+ </xs:restriction>
+ </xs:simpleType>
+ </xs:attribute>
+ </xs:complexType>
+
+ <xs:simpleType name="positiveInteger">
+ <xs:restriction base="xs:integer">
+ <xs:minInclusive value="1"/>
+ </xs:restriction>
+ </xs:simpleType>
+
+ <xs:complexType name="ifType">
+ <xs:group ref="itemType"/>
+ <xs:attribute name="cond">
+ <xs:simpleType>
+ <xs:restriction base="xs:string">
+ <xs:pattern value=".+[!]?=.*"/>
+ </xs:restriction>
+ </xs:simpleType>
+ </xs:attribute>
+ </xs:complexType>
+
+ <xs:complexType name="if_remaining_bytesType">
+ <xs:group ref="itemType"/>
+ </xs:complexType>
+
+ <xs:complexType name="fieldType">
+ <!-- xs:choice -->
+ <xs:attribute name="length" type="positiveInteger"/>
+ <xs:attribute name="length_var" type="xs:string"/>
+ <!-- /xs:choice -->
+ <xs:attribute name="name" type="xs:string" use="optional"/>
+ <xs:attribute name="longname" type="xs:string" use="optional"/>
+ <xs:attribute name="type" use="optional">
+ <xs:simpleType>
+ <xs:restriction base="xs:string">
+ <xs:enumeration value="string"/>
+ <xs:enumeration value="integer"/>
+ <xs:enumeration value="real"/>
+ </xs:restriction>
+ </xs:simpleType>
+ </xs:attribute>
+ <xs:attribute name="unit" type="xs:string" use="optional"/>
+ <xs:attribute name="minval" use="optional"/>
+ <xs:attribute name="maxval" use="optional"/>
+ <xs:attribute name="fixed_value" use="optional"/>
+ <!--<xs:anyAttribute/>-->
+ </xs:complexType>
+</xs:schema>